Reaming device



T. P. CARROLL ET MIL.

REAMING DEVICE Filed Aug. 21. 1922 2 Sheets-Sheet l gwuwntoz w Q 1 1 %m atkozmaq do 9 v v v T. P. CARROLL. ET AL REAMING DEVICE Filed Aug. 21, 1922 2 Sheets-Sheet 2 Patented Oct. 9, 1923.

nurse stem v than r caries.

REAIVIING DEVICE.

Application filed August 21, 1922. Serial No. 583,284.

To aZZ whom 2'25 may concern Be it known that TYLER P. CARROLL and EDWARD GRAFF, citizens of the 'United States, residing at Seattle, in the county of King and State of W ashington, have in vented certain new and useful Improvements in Beaming Devices, of which the following is a specification.

This invention is directed to a multiple reaming device, designed particularly for reaming and properly sizing crank shaft bearings, and adapted in such use to provide for simultaneously reaming the bearings in perfectly aligned relation.

The invention generally stated comprises an operating shaft, provided with means whereby it may be held in proper relation to the hearings to be operated upon, and also adapted for a progressive longitudinal movement in operation. Mounted upon the shaft are cutter carriers adapted to slidably receive a plurality of cutters, the cutter carriers being constructed to permit the adjustment of the cutters therein to vary the cutting diameter of such cutters at will. Adjusting ferrules are threaded upon the shaft and adapted to cooperate with the cutters to adjust the latter longitudinally of the carriers to thereby provide for variation in cutting diameters.

In the drawings:

Fig. 1 is a plan view showing the improved reamer in applied position with relation to the crank case.

Fig. 2 is an enlarged broken plan of the reamer removed.

Fig. 3 is a section on line 3-3 of Fig. 2.

Fig. 4 is a section on line 4-4 of Fig. 2.

Fig. 5 is a longitudinal section of the adjusting ferrule.

The improved reamer comprises an operating shaft 1, provided at one end with a hand wheel 2, having a handle 3, whereby the shaft may be rotated at will. An end support for the shaft is provided in a barlike structure 4, having sides to embrace the crank case and terminal ends 5 to engage a portion of the crank case to secure the end support in fixed relation at one end of the crank case. The opposite end of the operating shaft is supported in a cross bar 6,

which may bear at the opposite end of they crank case or at an intermediate point, the invention contemplating a plurality of such cross bars 6 if necessary to properly support the operating shaft. Both the end support 4 and cross bars 6 have a rectangular central portion 7, in which is slidably mounted a i block 8, a bolt 9 having threaded connection with the block being arranged to position the block asmay be found necessary in setting up the shaft. The block 8 is formed with an opening 10, through which the shaft 1 passes, this opening in the end support 4 being threaded for cooperation with threads 11 on the shaft.

A plurality of conical cutter carriers 12' are arranged upon the shaft and formed at diametrically opposite points with under cutgrooves 18 to slidably receive cutters 14. These cutters are shaped to fit the under cut grooves and have their cutting edges 15 at such an angle as will provide the desired reaming cut in the use of the cutters. Ferrules 16 are arranged for threaded connection at 1'7 with the operating shaft, these ferrules having their ends next the carriers, there being one ferrule for each carrier, cut away at 18 so as to permit the smaller ends of the carriers to pass within the ferrules for a considerable distance.

Obviously with the cutters slidable in the carriers, the ferrule may be adjusted longitudinally of the shaft so as to force said cutters lengthwise the channels 13 in said carriers. This movement of the cutters due to the conical shape of the carrier and corresponding incline of the grooves 13, will cause the operating edges of the cutters to be projected beyond the axial line of the shaft to a greater or less degree. Thus the cutters may be adjusted through operation of the ferrules to give the exact cutting diameter desired. 1

In the use of the device in reaming crank shaft bearings, the upper halves of the bearings are removed, the end support 4 and cross bar supports 6 are positioned and the blocks 8 adjusted to arrange the operating shaft in proper position in the fixed halves of the bearings. The top halves of the bear ings are now applied and secured tightly in position through the usual bolts, the cutters adjusted to provide the cutting diameter desired and fixed in this position by the ferrules. The operating shaft is now rotated so as to advance it longitudinally with respect to the end support, whereupon the cutters are simultaneously moved through the bearings with the result that the bearings are reamed to size and absolutely accurate with respect to alignment.

uru!) adapted more particularly for reaming crank shaft hearings to size and absolute alignment.

Claims:

1. 'In a reaming device, a reamer shaft, an

end, support there-for having: hook terminals and a vertically adjustable support for the opposite end of said shaft, comprising a crossbar, an open rectangular portion carried by the cross bar, and a block cooperating' with the reamer shaft and vertically adjustable in said rectangular portion.

In a reaming device, a reamer shaft,

end supports therefor, one of said supports having side portions to embrace a crank case, and hook ends to interlock with av portion of thecrank case to fix said support in position relative to the crank case, the other of said supports including a rectangular frame portion, a block With which the reanier shaft cooperates vertically slidable in said end portion, means carried by the rectangular frame portion and cooperating with the block to adjust said block in said frame portion, and a cross bar to Which the frame portion is connected.

In testimony whereof We afiix our signatures.

TYLER. P- RO EDWARD GRAFF. 

